| roof plate | The thin layer of the embryonic neural tube connecting the alar plate's dorsally. Synonym: dorsal plate of neural tube. (05 Mar 2000) |
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| roofing | 1. The act of covering with a roof. 2. The materials of which a roof is composed; materials for a roof. 3. Hence, the roof itself; figuratively, shelter. "Fit roofing gave." 4. <chemical> The wedging, as of a horse or car, against the top of an underground passage. Source: Websters Dictionary (01 Mar 1998) |
| rooftree | The beam in the angle of a roof; hence, the roof itself. "Now for me the woods may wither, now for me the rooftree fall." (Tennyson) Source: Websters Dictionary (01 Mar 1998) |
| rook | 1. <ornithology> A European bird (Corvus frugilegus) resembling the crow, but smaller. It is black, with purple and violet reflections. The base of the beak and the region around it are covered with a rough, scabrous skin, which in old birds is whitish. It is gregarious in its habits. The name is also applied to related Asiatic species. "The rook . . . Should be treated as the farmer's friend." (Pennant) 2. A trickish, rapacious fellow; a cheat; a sharper. Origin: AS. Hrc; akin to OHG. Hruoh, ruoh, ruoho, Icel. Hrkr, Sw. Roka, Dan. Raage; cf. Goth. Hrukjan to crow. Source: Websters Dictionary (01 Mar 1998) |
| rooky | Misty; gloomy. "Light thickens, and the crow Makes wing to the rooky wood." (Shak) Some make this Shakespearean word mean "abounding in rooks." See: Roky. Source: Websters Dictionary (01 Mar 1998) |
| room | 1. Unobstructed spase; space which may be occupied by or devoted to any object; compass; extent of place, great or small; as, there is not room for a house; the table takes up too much room. "Lord, it is done as thou hast commanded, and yet there is room." (Luke xiv. 22) "There was no room for them in the inn." (Luke II. 7) 2. A particular portion of space appropriated for occupancy; a place to sit, stand, or lie; a seat. "If he have but twelve pence in his purse, he will give it for the best room in a playhouse." (Overbury) "When thou art bidden of any man to a wedding, sit not down in the highest room." (Luke xiv. 8) 3. Especially, space in a building or ship inclosed or set apart by a partition; an apartment or chamber. "I found the prince in the next room." (Shak) 4. Place or position in society; office; rank; post; station; also, a place or station once belonging to, or occupied by, another, and vacated. "When he heard that Archelaus did reign in Judea in the room of his father Herod." (Matt. Ii. 22) "Neither that I look for a higher room in heaven." (Tyndale) "Let Bianca take her sister's room." (Shak) 5. Possibility of admission; ability to admit; opportunity to act; fit occasion; as, to leave room for hope. "There was no prince in the empire who had room for such an alliance." (Addison) Room and space, the distance from one side of a rib to the corresponding side of the next rib; space being the distance between two ribs, in the clear, and room the width of a rib. To give room, to withdraw; to leave or provide space unoccupied for others to pass or to be seated. To make room, to open a space, way, or passage; to remove obstructions; to give room. "Make room, and let him stand before our face." (Shak) Synonym: Space, compass, scope, latitude. Origin: OE. Roum, rum, space, AS. Rum; akin to OS, OFries. & Icel. Rum, D. Ruim, G. Raum, OHG. Rum, Sw. & Dan. Rum, Goth. Rums, and to AS. Rum, adj, spacious, D. Ruim, Icel. Rumr, Goth. Rums; and prob. To L. Rus country (cf. Rural), Zend rava<ndot/h wide, free, open, ravan a plain. Source: Websters Dictionary (01 Mar 1998) |
| room temperature | The ordinary temperature (65 |
| roomage | Space; place; room. Origin: From Room. CF. Rummage. Source: Websters Dictionary (01 Mar 1998) |
| rooming-in care | Care of the newborn infant in a crib near the mother's bed, instead of in a nursery, during the hospital stay. (12 Dec 1998) |
| roost | 1. To sit, rest, or sleep, as fowls on a pole, limb of a tree, etc.; to perch. 2. Fig.; To lodge; to rest; to sleep. "O, let me where thy roof my soul hath hid, O, let me roost and nestle there." (Herbert) Origin: Roosted; Roosting. Source: Websters Dictionary (01 Mar 1998) |
| roostcock | The male of the domestic fowl; a cock. Source: Websters Dictionary (01 Mar 1998) |
| rooster | The male of the domestic fowl; a cock. "Nor, when they [the Skinners and Cow Boys] wrung the neck of a rooster, did they trouble their heads whether he crowed for Congress or King George." (W. Irving) Source: Websters Dictionary (01 Mar 1998) |
| root | <botany> The water- and mineral-absorbing part of a plant which is usually underground, does not bear leaves, tends to grow downwards and is typically derived from the radicle of the embryo. See: adventitious. (09 Oct 1997) |
| root abscess | A pocket of pus adjacent to or within (apical abscess) the tooth's root caused by plaque and calculus invasion. Symptoms include tooth pain and tenderness that may be accompanied by facial swelling and a fever. Treatment includes antibiotics and a thorough cleansing of the infected site by a dentist. See: apical abscess. (27 Sep 1997) |
| root amputation | Surgical removal of one or more roots of a multirooted tooth, the remaining root canal(s) usually being treated endodontically. Synonym: radectomy, radiectomy, radisectomy. (05 Mar 2000) |